JSON格式化工具
使用语法高亮和错误检测格式化、验证和压缩JSON
Output will appear here
Paste your JSON and click format
Client-side processing
Your data never leaves your device
JSON Formatter & Validator
Paste minified or broken JSON and get it instantly formatted, indented, and validated. Highlights syntax errors with the exact line number — the fastest way to debug API responses.
FAQ
How do I format JSON online?
Paste your JSON and click Format. The tool indents it with 2-space or 4-space tabs and validates the structure.
How do I fix invalid JSON?
The validator highlights the error line. Common issues: trailing commas, missing quotes on keys, unescaped characters.
What is the difference between JSON and JSONC?
JSONC allows // comments. Standard JSON does not. Strip comments before parsing with most parsers.
How do I minify JSON?
Use the Minify button to remove all whitespace from JSON — useful when sending data in HTTP requests to reduce payload size.
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